Finding the Fourth Proportional to 16,870.52, 23,279.00 and 9,700.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,870.52 : 23,279.00 = 9,700.80 : x
2. Step 2: Convert to fraction form
   16,870.52/23,279.00 = 9,700.80/x
3. Step 3: Cross multiply
   16,870.52x = 23,279.00 × 9,700.80
4. Step 4: Simplify right side
   16,870.52x = 225,824,874.70
5. Step 5: Solve for x
   x = 225,824,874.70/16,870.52
6. Step 6: Final answer
   x = 13,385.77